[Discuss-gnuradio] GNU Radio Frequency Divider

[paGNU iea]

Hi, my name is paul.

I have a little issue, I need to do a frequency divider by 2, I did a
frequency multiplier by 2 and it is simple, because it is a multiply block
that have the same signal source at the inputs, and it produces at the
output the frequency adition, but the case of divider is complicated.

At the first I've tried multiplying by a cosine wave at half the frequency
. However there is a problem with the synchronization

Also I know I can resample up and then treat it as if I'm at the same
frequency, however I want to divide the frequency of my signal by 2 and
keep the same number of samples.

Also I was trying to do a python embeded block in GNU Radio, but I found it
a little complicated
How would one implement a frequency divider?

Thank you all for your time .

[Müller, Marcus (CEL)]

Hi Paul!

Just like in the analog world, frequency dividers are harder to
implement, since you can't simply use trigonometric formulas as you can
to double frequencies.

In hardware, you'd, typically, you'd do something like a PLL to
discipline your own oscillator to run at a fraction of the rate that
your input does. You could, hypothetically, do something similar in GNU
Radio. But:

This is digital signal processing. You could just as well
measure/estimate the frequency of your input, and then just run a sine
signal source at half of that rate.

What is the use case you're doing this for? I'd recommend painting "the
bigger picture", because there's a lot of enthusiastic experts on here
that just wait to comment on cool problems :)

Best regards,
Marcus

Post by paGNU iea
Hi, my name is paul.
I have a little issue, I need to do a frequency divider by 2, I did a frequency multiplier by 2 and it is simple, because it is a multiply block that have the same signal source at the inputs, and it produces at the output the frequency adition, but the case of divider is complicated.
At the first I've tried multiplying by a cosine wave at half the frequency . However there is a problem with the synchronization
Also I know I can resample up and then treat it as if I'm at the same frequency, however I want to divide the frequency of my signal by 2 and keep the same number of samples.
Also I was trying to do a python embeded block in GNU Radio, but I found it a little complicated
How would one implement a frequency divider?
Thank you all for your time .
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